all: update description of some command and in README

Mention that some of the commands are example of implementation of the
library.

2 files changed, 9 insertions, 0 deletions

diff --git a/cmd/smtpcli/main.go b/cmd/smtpcli/main.go
index bea03d58..215ac370 100644
--- a/cmd/smtpcli/main.go
+++ b/cmd/smtpcli/main.go
@@ -3,6 +3,10 @@
 // license that can be found in the LICENSE file.
 
 // Command smtpcli provide a command line interface to SMTP client protocol.
+// This is an example of implementation Client from
+// [lib/smtp].
+//
+// [lib/smtp]: https://pkg.go.dev/github.com/shuLhan/share/lib/smtp
 package main
 
 import (
diff --git a/cmd/totp/main.go b/cmd/totp/main.go
index bd28a278..aef717b0 100644
--- a/cmd/totp/main.go
+++ b/cmd/totp/main.go
@@ -1,4 +1,9 @@
 // Program totp generate Time-based One-time Password from secret key.
+// This is just an example of implementation of [lib/totp]
+// See [gotp] for a complete implementation that support encryption.
+//
+// [lib/totp]: https://pkg.go.dev/github.com/shuLhan/share/lib/totp
+// [gotp]: https://sr.ht/~shulhan/gotp
 package main
 
 import (